is 2 3087869 - 1
has 929542 decimal digits
takes 0.263 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L4D3260E156401BF4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26819.302967.6471%30000001000000001.02248.0448%20.325470.2498%2.6027%
PrimeNet2600.049763.3333%120002200000.00292.5285%0.052664.2605%0.9271%
GPU722641.152765.6250%140002400000.00321.5060%1.155966.1427%0.5177%
Difference+4+18.1502+2.0221%+2986000+99760000+1.0192+6.5388%+19.1694+4.1071%+4.1071%

Known prime factors (1 factor, 86.4 bits, 0.00279673% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3087869992559006853495890568388392686.35916071909249607024951
8849 × 1816240168336199
2020-12-29884918162401683361997,086,56812,211,99522,808,606

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-02-14T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.250%
2009-07-03T00:51:00Carsten Kossendeyleela15000180000---0.003--0.762%
2011-08-14T20:27:00harleeP4_26001000002125000---0.026--2.536%
2016-04-15T01:17:44Jocelyn LaroucheManual testing20000061807946---0.065--3.625%
2018-04-08T09:03:53mikrMSI300000010000000012---1.022--8.045%
2022-02-20T22:18:18Jocelyn LaroucheManual testing1000000128282700---0.979--7.551%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-07-07T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-12T21:32:00Sturle Sundegorro.ifi260261--0.050--
2011-11-21T06:50:00Sid & AndyBuzz261262--0.099--
2013-01-03T08:40:00dbaughManual testing262263--0.318--
2015-02-07T18:29:00VictordeHollanderManual testing263264--0.636--
2015-02-07T18:29:00VictordeHollanderManual testing264265--1.210--
2015-06-08T12:39:00ThaManual testing265266--2.420--
2017-05-18T12:32:21Gordon SpenceManual testing266267--4.840--
2018-08-13T10:40:14ramgeisManual testing267268--9.68--


ECM factoring results:

Old Calculation Method

Total ECM effort:3.735 GHz-days
Estimated T-Level:1.600
DigitsB1CurvesCompleteFacMiss
201100032 / 1000.32072.498%
255000032 / 2800.11489.182%

New Calculation Method

Total ECM effort:3.735 GHz-days
Estimated T-Level:1.600
DigitsB1CompleteFacMiss
20110001.03235.620%
25500000.09391.093%
302500000.00699.427%


ECM Summary

B1B2factorcurvesGHz-days
500005000000293.385
50000500000030.350


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-09-07T00:00:00ANONYMOUSv4_computers4D3260E156401BF40.263


PRP results:
dateuseridcompidcofactorsres64PRP
2020-12-29T10:10:55firejugglerMaison
99255900685349589056838839
B26C603BB517E0B9no
2020-12-29T22:30:09Niels_Mache_Nextcloudstrt03
99255900685349589056838839
B26C603BB517E0B9no


P-1 factor-bounds graph:
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1000000, B2 = 128282700 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 200000, B2 = 6180794 (P-1 stage 2)
B1 = 100000, B2 = 2125000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 15000, B2 = 180000 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-02-20T22:18:18+00:00